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ID:58568591
大小:3.45 MB
页数:63页
时间:2020-10-21
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1、现在完成时时态的核心-------动词Studyingaims1.现在完成时的构成2.现在完成时的主要用法及相关的时间状语3.短暂性动词与时间段的关系4.havebeen与havegone比较5.与一般过去时的用法比较夏天还会远吗?willitstillbefarinsummer?春天已经来了,Springhasalreadycome,主语+have/has+过去分词(pp)助动词,无意义现在完成时的结构Winterhasalreadycome,willitstillbefarinspring?主语+h
2、ave/has+过去分词(pp)否定形式haven’t(havenot)+过去分词hasn’t(hasnot)+过去分词疑问句把助动词have/has放在句首现在完成时的结构注:主语若是第三人称单数助动词用has(过去分词的变化规则参照动词过去式,少数不规则形式特殊记!)Youhaveplantedallthetrees.Ihaveplantedallthetrees.He/shehasplantedallthetrees.Theyhaveplantedallthetrees.区别have和has的用法
3、主语若是第三人称单数助动词用has过去分词的变化规则有五种:1、一般在动词原形后加-ed。例:look;looked;looked;call;called;called注意:-ed在清辅音音素后发音为[t],在浊辅音后发音为[d],在元音后发音也为[d],-ed在[t]、[d]后发音为[id]needed[ni:did].2、以-e结尾的动词直接加-d。例:move;moved;moved;phone;phoned;phoned3、以辅音字母加y结尾的动词,变y为i,再加-ed。例:study;stud
4、ied;studied4、以元音字母加y结尾的词,直接加-ed。例:play;played;played5、末尾只有一个辅音字母的重读闭音节词,双写该辅音字母,再加-ed。例:stop;stopped;stopped不规则变化原形过去式过去分词1.AAA型costcostcost2.AAB型beatbeatbeaten3.ABA型runranrun4.ABB型sitsatsat常用不规则过去分词be(am,is,are)(是)was,werebeenbegin(开始)beganbegundrink(喝)
5、drankdrunkring(铃响)rangrungsing(唱)sangsungswim(游泳)swamswumblow(吹)blewblowndraw(画)drewdrawnfly(飞)flewflowngrow(生长)grewgrownknow(知道)knewknownthrow(投掷)threwthrownshow(出示)showedshownbreak(打破)brokebrokenchoose(选择)chosechosenforget(忘记)forgotforgotten(forgot)spe
6、ak(说,讲)spokespoken总结13练习:把下列句子变否、变疑。1.Wehaveseenthefilm.否:_______________________________疑:_______________________________2.Hehasheardofitbefore.否:_______________________________疑:_______________________________3.Shehasbeenherefortwoyears.否:_____________
7、__________________疑:_______________________________Wehaven’tseenthefilm.Haveyouseenthefilm?Hehasn’theardofitbefort.Hasheheardofitbefort?Shehasn’tbeenherefortwoyear.Hasshebeenherefortwoyear?144.IhavewatchedtheTVplay.否:_______________________________疑:____
8、___________________________5.Jimmyhasfoundhislostpen.否:_______________________________疑:_______________________________6.Ihavealreadyhadmysupper.否:_______________________________疑:_______________________________Ihaven’twat
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